Law of Conservation of Energy . . . 35
Pump Inlet . . . . . . . . . . . . . . . . . . . . . . . . . 37
Forms of Energy . . . . . . . . . . . . . . . . . . . . . . . 38
Work and Power . . . 38
Conversion Table . . . . . . . . . . . . . . . . . . . . . . 40
Chapter 3
Symbols, Drawings, and Product Literature 45
Introduction to Symbols, Drawings, and Product Literature . . . 45
Pictorial Drawings . . . 45
Cutaway Drawings . . . 46
Exploded Component Drawings . . . 47
Graphic Drawings . . . 48
Types of Graphic Symbols . . . . . . . . . . . . . . . . . . . 49
Colors . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Combination Drawings . . . 60
Chapter 4
Pumps 65
Introduction to Pumps . . . 65
Non-Positive-Displacement Pumps. . . . . . . . . . . . . . . . 65
Positive-Displacement Pumps . . . . . . . . . . . . . . . . . 66
Fixed versus Variable Displacement . . . . . . . . . . . . . . . 68
Unidirectional and Reversible . . . . . . . . . . . . . . . . . . 69
Open Loop and Closed Loop . . . . . . . . . . . . . . . . . . 70
Gear Pumps . . . 70
Gear Pump Attributes . . . . . . . . . . . . . . . . . . . . . 71
External-Toothed Gear Pumps . . . . . . . . . . . . . . . . . 71
Internal-Toothed Gear Pumps . . . . . . . . . . . . . . . . . . 72
Gear Pump Inspection . . . . . . . . . . . . . . . . . . . . 74
Case Drain . . . . . . . . . . . . . . . . . . . . . . . . . 75
Gear Pump Leakage . . . . . . . . . . . . . . . . . . . . . 75
Load-Sensing Gear Pumps. . . . . . . . . . . . . . . . . . . 76
Vane Pumps . . . 76
Types of Vane Pumps. . . . . . . . . . . . . . . . . . . . . 76
Single-Lobe versus Dual-Lobe Vane Pumps . . . . . . . . . . . . 77
Fluid Pressure for Holding the Extended Vanes . . . . . . . . . . . 78
High-Performance Intra-Vane Pump . . . . . . . . . . . . . . . 78
Cartridges . . . . . . . . . . . . . . . . . . . . . . . . . 79
Variable-Displacement Vane Pumps . . . . . . . . . . . . . . . 80
Vane Pump Inspection . . . . . . . . . . . . . . . . . . . . 80
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